The New York Times weighs in

Two years ago, when a splintered Supreme Court approved lethal injection as a means of execution in Baze v. Rees, Justice John Paul Stevens made a prophecy. Instead of ending the controversy, he said, the ruling would raise questions “about the justification for the death penalty itself.” Since then, evidence has continued to mount, showing the huge injustice of the death penalty — and the particular barbarism of this form of execution.